Improvement in bits and augers



s fammi tant ND Y te. aan

ENGLAND.

Letters Patent No. 88,760, elated Aprilv 6, 1869.

IMPROVEMENT IN BITS AND .AUG-ERS.

The Schedule referred to in these Letters Patent and making part of the same.

To all to whom these presents shall come:

Be it known that I, CORNELIUS WHiTEHoUsE, of Bridgtown-near-Gannock, in the county of Stafford, -England, edge-tool and auger-maker, a subject of the Queen of Great Britain, have invented or discovered new and useful Improvements in Boring-Bits and Angers, and I, the said CORNELIUS WHITEHOUSE,

do hereby declare the nature of the said invention, and

in what manner the same is to be performed, to he particularly described and ascertained in and by the following statement thereof.

The nature of my improvement consists in boringbitsand angers, so constructed that their barrels consist of a forked frameopen on opposite sides, the noseend being provided with a helical, or inclined blade, or blades, or cutting-edge, oredges, and the two sides, or limbs constituting the frame, united at the shank-end, toform a tang for connecting with the handle; and in such a modification thereoi` as will admit, in certain cases, of one limb, or fork being dispensed with, but

retaining the cutting-parts, in connection with the re-` maining limb and tang.

Bits or angers, constructed according to my invention, may be madl without a central Worm, or point. The nose, or acting-end of the bit, or auger may be flat, or convex, .or pointed.

The blades, or cutting-edges of the bits, or angers,

may be made on two opposite sides of the nose, oron,

one side only. When the nose of the bit, or auger is 4pointed and without a Worm, each side of the pointed blade is made'into a cutting-edge.

The inner sides of the rectangular frame ofthe bit, or auger are preferably made flat, and the outer sides convex.

In using a boring-bit, or auger constructed according to my invention, the wood, or material cut or boredl out, enters the fork, or frame of the tool, andthereby prevents the said cut-out parts from offering any .rei Vordinary construction.

Having explained the nature of my invention, I will proceed to describe the same, with reference to the ae companying drawings.

Figures 1 and 2 represent side elevations, taken at right angles to one another,i and an end elevation of' a boring-bit, or auger, made` according to one form of my invention; and y Figure 3 is a cross-section ofthe same, taken through the line iig. l. Y

The body of the boring-bit, or auger consists of a rectangular frame, l), open on opposite sides. This frame I will hereinafter call the barrel.

0n the bottom, or nose-end c, of the barrel l, are two helical blades, or cutting-edges d d, and at the centre of the said nose-end is-a worm, e.

The blades, or cutting-edges al cl, are made on opposite sides of the nose-end c of the barrel b of the boring-bit, or auger, as seen in gs. 1 and 2, the said blades, or cutting-edges starting from or being continuatons of the thread of the central worm e.

The opposite end of the barrel b to that at which the blades, or cutting-edgesd d are situated, is a stem, or tang, e2, to be tted to the handle of the bit oranger.

The inner sides of the barrel l1 are flat, and the outer sides are convex, as seen in g. 3.

Ink using the boring-bit, or auger, the centralworm e is `first driven into the Wood, or material to be bored, and, when the said worm has been driven home, the helical cutting-edges al 'll commence to act, and cut, or bore a circular hole, the wood or material cut, or bored out entering the forli, or hollow barrel b, and thereby preventing any resistance to, or impeding the action of the tool.

The rectilinear sides of the auger, as-it penetrates into the material acted upon, furnish a steady and effective guide to the ucutters, so that the hole formed is more smooth and true than it can be made by means of the ordinary anger in common use.

The said tool makes a clear cut as it leaves the material operated upon, instead of a jagged, or splintered edge, as when using boring-bits, or angers ofthe ordi'- nary kind, and eXtra-cts all the chips.

' l4 will now proceed to describe various modifications in form of my improved bits, or angers, represented in the accompanying drawings.

Figure 4 represents in cross-section thenose or act--` ing-end of the barrel of a boring-bit, or anger, constructed according to my invention, having one helical cutting-blade, or edge, marked h, the said blade being made on one side only ofthe nose-end ofthe barrel.

Figure 5 represents, inside elevation and end elevation, a boring-bit, or anger, made according to my iuvention, having a flat nose', c, with two `cuttingedges.

The cuttingedges are markedi c', and form a continuation of the thread of the central worm e.

Figure 6 represents, inlelevation and cross-section, a boring-bit, or auger, made according` to my invention, in which the nose-end c, of the barrel b, is pointed and lWithout a Worm. v

Inthis form the two opposite sides of the pointed nose-end are made into cutting-edges, marked k It.

The apex of the nose of this boring-bit, or auger is provided With a leading-point, marked l, that is, one of the cutting-edges k projects over the other at the apex of the nose, as seen in the side elevation of fig. 6.

Figure 7 represents, in side elevation and cross-section, a boring-bit, or auger, made according' to my in- .vention, provided with a convex nose, and without a having a central worm, e, and a helical blade or cut! ting-edge, n, the said blade, or cutting-edge 11, forming a continuation ofthe thread of the Worm e.

This boring-bit, or auger may be, made Without a worm, or point, in which case the bit, or auger will cut on one edge only.

Figure l0 represents, in side elevation and end elevation, another form of my invention, in which one side only-of the forked frame, or barrel is used. In this form of my invention, the cutting-blade, or edge q is made on theinner side of the projecting nosepiece p, and the worm eis situated at the centre of the said nose-piece p.

The nose-piece p may be made flat, instead of conveX. I prefer to make the inner side of the half barrelib concave, as represented in the cross-section, but

it may be made Hat, as in the barrels of the boringrespects, save the lip, or cutting-edge, similar to mine;

but these I do not claim.

What I claim as my invention, and desire to secure by Letters Patent, is

A boring-bit, or auger, having a hollow, or open barrel, formed of a forked frame, or rectilinear limbs, united at the tang, and provided with a helical blade, or blades, or other cutting-edge, or edges, either with or without a central worm, or leading-point, substantially as herein set forth. f

I also claim a boring-bit, or auger, formed, as within described, when the barrel thereof consists of a single bar, or member, b, of the frame, and is provided with a square, or helical blade, or cutting-edge atthe nose, and either with or Without a central Worm, or point, substantially as shown and described.

CORNELIUS WHITEHOUSE. [L. 8.]

Witnesses:

GEORGE SHAW,

7 Gannon Street, Bdrmmgham'. RICHARD SKERRETT, p

7 Cannon Street, Bi/rmtngham. 

